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How to check that a string is an int, but not a double, etc.?

PHP has an intval() function that will convert a string to an integer. However I want to check that the string is an integer beforehand, so that I can give a helpful error message to the user if it's wrong. PHP has is_int() , but that returns false for string like "2" . ...
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How to get week number in Python?

... This approach is better in cases where you don't want to split or convert a date which comes as a string... just pass the string in strptime in string format as it is and specify the format in second argument. Good solution. Remember: %W if week starts on Mondays. – Th...
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How do I force a UITextView to scroll to the top every time I change the text?

...tion:0, length:0, worked. My text view was not editable, and I tested both selectable and not selectable (neither setting affected the result). Here's a Swift example: myTextView.text = "Text that is long enough to scroll" myTextView.scrollRangeToVisible(NSRange(location:0, length:0)) ...
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Windows Explorer “Command Prompt Here” [closed]

... the command window. Edit: In case you are in a folder and you already selected some of its contents (file/folder) this wont work. In that case Click on the empty area inside the folder to deselect any previously selected files and repeat. Edit2: Another way you can open terminal in current di...
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How to add 30 minutes to a JavaScript Date object?

...in case this is not obvious, the reason we multiply minutes by 60000 is to convert minutes to milliseconds. Be Careful with Vanilla Javascript. Dates Are Hard! You may think you can add 24 hours to a date to get tomorrow's date, right? Wrong! addMinutes(myDate, 60*24); //DO NOT DO THIS It turns...
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Twitter bootstrap scrollable table

...able; table-layout: fixed; } table{ height:300px; // <-- Select the height of the table display: -moz-groupbox; // Firefox Bad Effect } tbody{ overflow-y: scroll; height: 200px; // <-- Select the height of the body width: 100%; position: absolute; }...
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Qt events and signal/slots

...lated? An idle main loop (Qt’s for example) is usually “stuck” in a select() call of the operating system. That call makes the application “sleep”, while it passes a bunch of sockets or files or whatever to the kernel asking for: if something changes on these, let the select() call return...
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Transpose list of lists

... each column. The columns are just passed through to the outer map() which converts them from tuples to lists. Somewhere in Python 3, map() stopped putting up with all this abuse: the first parameter cannot be None, and ragged iterators are just truncated to the shortest. The other methods still wo...
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Insert HTML into view from AngularJS controller

...r $sce to resolve that. $sce Use $sce.trustAsHtml() in the controller to convert the html string. $scope.thisCanBeusedInsideNgBindHtml = $sce.trustAsHtml(someHtmlVar); ngSanitize There are 2 steps: include the angular-sanitize.min.js resource, i.e.: <script src="lib/angular/angular-sanit...
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“for loop” with two variables? [duplicate]

...other set (Note that if your lists contains other lists, you might want to convert the inner lists to tuples first so that they are hashable; otherwise the call to set will fail.). The list function then turns the set back into a list. UPDATE 2 OR, the OP might want elements that are identical in...